One cyclinder not working/firing

1981yamahaxs400caferacer

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Hello, I’ve got an 1981 Yamaha xs400 with Mikuni carbs and pod filters. It was running fine a few weeks ago but today seemed under powered…and upon parking…started to leak fuel non stop out of the right carb…not the left. I removed the pod filters and started it up…it idles well but the headers only heat up on the right side…I can literally grab the left side exhaust with my bare hand and hold it. Would this be a carb issue? Float bowl perhaps? Why is the right hand side carb spewing fuel? It gets started once a week and ridden around the neighborhood so it hasn’t been sitting around creating bad gas…please help!!!
 
I think stuck float would still allow feul to flow to cylinder. so cylinder would still be firing. feul just doesnt shut off so it floods.. good luck!!!
 
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